%0 Journal Article
%A P. L. Gurevich
%T On the index instability for some nonlocal elliptic problems
%J Trudy Seminara im. I.G. Petrovskogo
%D 2007
%P 179-194
%V 26
%N 26
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TSP_2007_26_26_a7/
%G ru
%F TSP_2007_26_26_a7